Automobile-jack.



L. He ERSKINE.

AUTUIVIOBILE JACK.

APPLICATION FILED IULV. I9I5.

Patented May 30, 1916.

UNITED STATES PATENT OFFICE.

LEE H. ERSKINE, F TOPEKA, KANSAS.

AUTOMOBILE-JACK.

Specification of Letters Patent.

Patented May 30, 191'.

Application filed July 7, 1915. Serial No. 38,534.

` of this application is a jack adapted to .to provide novel means be employed for elevating vehicles and for other purposes The invention aims to provide novel means for producing relative movement between the base and the top of the jack, and for guiding the movement of the base with respect to the to ,IIJt is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the y present invention appertains.

With the above and other objects in view j which` will appear as the description pro-- ceeds, the invention resides' in the combinafl tion and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawing: Figure l Shows the invention in side elevation; Fig. 2 is a vertical longitudinal section; Fig. 3

- is a perspective delineating the base; Fig.

4 is a perspective showing one of the links; Fig. 5 'is a cross section on the line 5 5 of Fig. 2; Fig. 6 is a perspective showing one of the nuts; Fig. 7 is a cross section on the line 7-7 of Fig. 2.

In carrying out the present invention there is provided a base 1 which may be variously constructed, the saine being shown as embodying a foot plate 2 provided. with an upstanding rib 3 having slots 4 1n its ends, the slots 4 defining ears 5 having oppositely disposed openings 6. In the body portion of the rib 3, between the slots 4, openings 7 are formed.

The top of the jack is indicated at 8 and is preferably although not necessarily an exact duplicate of the base l.

The invention comprises a pair of nuts 9 provided in their ends with slots 11L which defines wings 10 having opposed openinqw 'through v tween the bar 14. Each nut 9 is equipped with a threaded passage 15, the passages l5 in the respective nuts being threaded in opposite directions.

The .invention comprises four rigid links 16 equipped with openings 17 in their ends. The outer ends of the links 16 are received 1n the slots 4 of the base 1 and the top 8 and are pivotally held to the ears 5 by means of pivot elements 25. The inner ends of the links 16 enter the slots l1 of the nuts 9l and are pivotally assembled with the wings. Y v

y means of connecting elements-u24. f l J The invention comprises a-lon extensible connectio v means of f8 by means tact with the ring 23, as clearly shown in Fig. 7. Disposed between the upper ends of the bars 18a is a filler block 19 held in place by a securing element 32 which may be a rivet, the ller block thus being held in glace between the `upper ends of the bars 18".

uide strips.33 are united with the filler block 19 by means of securing elements 34, the guide strips 33 enga ing the edges of the strips 18 in a manner w ich will be obvious from Fig. 5.

A screw 26 is threaded in opposite directions as shown at 27 into the openings l5 of the nuts 9, the screw being squared at its ends as shown at 28 to receive a removable crank 29, although any other suitable means may bel provided for rotating the screw. The said screw 26 passes between the bars 18a of the longitudinally extensible connection, the intermediate portion of the screw` p ceiijr thevlower ends ofthe Y' l of securingv elements 30. The edgesof the bars 18a are in slidable con- The longitudinally extensible connection comprising the bars 18 and 18a unites the base 1 with the top 8 for right line move- Avtween the ends of the inner ment toward and away from each other.

-It will be observed that the jack herein disclosed comprises a minimum number of different parts, the cost of manufacturing being decreased accordingly.

Having thus described the invention, what is claimed is 1- In a vehicle jack, a pair of outer bars; a ring uniting the outer bars at their ends;

a pair of inl/1er bars mounted to slide be-V tween thefoter bars; a filler interposed bebars; vguide Y oted respectively strips connected to the filler and enga ing the edges of the outer bars; a top to w ich one set of bars is connected; a base to which the other set of bars is connected; links pivto the top and the base; opposed nuts to which the inner ends of the links are pivoted; and a screw threaded in opposite directions into the nuts.

In testimony that I claim the foregoing as my own, I have hereto aiixed my signature in the presence of two witnesses.

' `LEE H. ERSKINE.

Witnesses:

A. P. TONE WILSON', Jr.,

Bnss CAVE. 

